Valve.



P. A.- WARTER.

VALVE.

APPLICATION IIL'ED JUNE 13, 1907.

Patented Aug. 10, 1909.

ATTORNEY FRANK A. WARTER, or PERTH" AMBOY, NEW JERSEY.

VALVE.

Specification 01' Letters Patent. Application filed June 18, 1907.Serial No. 378,743.

Patented Aug. 10, 1909.

To all whom it may con/cam:

Be it known that I, FRANK A. citizen of the United States, residing atPerth Amboy, in the county of-Middlesex and State of New Jersey, haveinvented WAnrnR, a

;certain new and useful Improvements in Valves; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawin s, and to figures of. reference. marked t ereon,which form a part of this specification.

This invention relates to a valve, and is designed to provide a valveadapted for systems conveying acids, althou h it can be I used for theconducting of any uid or gas, and the valve is designed to provide aperfectly tight closure, and make an easy operating valve.

This valve also provides no stufling box around the valve stem, and theclosure in the valve is provided for by a diaphragm of flexible materialthat is arranged to be seated or unseated by the manipulation of thestem of the valve.

The invention is illustrated in the accompanying drawing, in which.

Figure 1 is an elevation of a valve of the improved construction, butshowing one half of the casing and the closing portions of the valve insection. 'Fig. 2 is a section on one that requires line 2, 2, in Fig. 1,and Fig. 3 is a section of a modified form ofconstruction.

The valve comprises a lower casing 10, shown in Fig. 1, which isprovided with suitable openings 11 and 12, providing inlet and outletports, and the casing is provided with a valve seat 13 that ispreferably centrally located. Above thecasing 10 is the portion" whichis held down by the i 14, of the casing, l, bolts 14. The upper portion15 of the part 14 of the casing is screw-threaded to receive thescrew-threads 16 of a valve stem 17 which is provided with a hand wheel18, at its top. The lower end of the stem 17 has a flange 18 which isrotatably arranged in a recess in a nut 19, so that the nut 19 isactuated longitudinally by the stem 17, but does not rotate therewith.

Screwed into the nut 19 is a screw-threaded washer 20. Into the washer20 is screwed a screw 21 that is attached to or integral with a plug 22that is operatedby a suitable projection 23 to allow its insertion andwith- 'possible, and no stuffing box drawal. When the screw 21 isscrewed home, it binds thedisks 24 and 25, and between them secures thediaphragm 26 which is made of flexible material, preferably soft rubber,and has its edges 27 clamped between the lower portion 10 and the upperportion 14 of the casing of the valve.

The plug-22 is preferably tapered to form a fairly tight fit into theseat 13, and is adapted to make a closure for the valve, but thediaphragm is kept away from contact with the valve seat and thus is notsubjected to the acid when the valve is shut. It will also be noticedthat the tight fit between the parts of the casing and the diaphragm,and the central disks and the diaphragm, makes leakage through thediaphragm 1maround or above the screw for operating the valve is necessar I f desired, I can make the valve as shown in Fig. 3, providing thelower portion 28, of the. valve casing, with a central tubular portionforming an outlet 29, and having the right-angled inlet 30 in the sideof the casing. This figure. shows the diaphragm in its position whenit'is open, and there is no obstruction or interruption of the flow ofliquid: through the valve when the valve is open.

This valve can be used for any purpose, but is preferably adapted foracids and the conveying of fluids, the nature of which makes themdangerous when they escape.

. The rotating stem to operate the withdrawal or seating of thediaphragm on its seat is not the only method that can be employed forcausing this movement, and I might also dispose the valve seatdilferently, and make it'of a difl'erent form. The diaphragm in thisconstruction is not attacked' by acid, except when the valve is open,and this makes the life of the diaphragm much longer than thoseconstructions where the acid has contact with the diaphragm, althoughonly to a slight extent, even when the valve is shut.

Having thus described my invention, what I claim is 1. A valvecomprising a valve casing having inlet and outlet ports and having avalve seat between them, an upper portion, a stem in screw-threadedengagement with the upper portion and having. a flange on its end, arecessed nut on the flanged end of the stem, a washer having ascrew-threaded porv disks, :1 flexible diaphragm arranged between thedisks and secured between the casing and the u per portion, and a screwpassing through t e disks and the diaphragm and into the washer fordrawing the parts together.

2. A valve comprising a valve casing havin inlet and outlet ports andhaving a valve seat between them, an upper portlon, a stem inscrew-threaded engagement with the upper portion and havinga flan e onits end, a recessed nut on the flange end of the stem, a washer having ascrewthreaded portion fitting in the nut on the end of the stem, disks,a flexible diaphragm arranged between the disks and secured between thecasing and the up er portion, a screw passing throu h the isks and thediaphragm and into t e washer for drawing the parts together, and a plugon the screw, the plug being adapted 'to be seated on the valve seat.

In testimony, that I claim the foregoing, I have hereunto set my handthis thirty-first day of May 1907.

FRANK A. WARTER.

\Vitnesses Trmo. DEGENRING, THOMAS J. SMITH.

